Eminence DELTA PRO 12-450A

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.1dB
• Frequency response 44 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 44Hz
• Mechanical quality factor QMS 7.59
• Electrical quality factor QES 0.39
• Total quality factor QTS 0.37

Large signal parameters

• Maximum linear excursion xmax 5.1mm
• Maximum excursion before damage xlim 13.7mm
• Air volume displaced at xmax VD 272cm³
• Power handling P 375W
• Program power Pmax 750W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.0Ω
• Inductance (1kHz) LE 0.54mH
• VC Diameter 64mm
• Winding material Aluminum
• Former material Polyimide

Magnet

• Force factor Bl 11.5N/A
• Motor constant Bl/√RE 5.11N/√W
• Air gap height HAG 7.9mm
• Weight 1.588kg
• Material Ferrite

Diaphragm

• Effective diameter 260mm
• Effective area SD 532cm²
• Moving mass MMS 36g
• Moving mass (without air load) MMD 27.2g
• Material Paper

Suspensions

• Stiffness KMS 2.78N/mm
• Compliance CMS 360µm/N
• Equivalent volume to the compliance VAS 142L
• Mechanical resistance RMS 1.31N·s/m
• Surround material Cloth

Dimensions

• Nominal diameter 12″
• 305mm
• Overall diameter 315mm
• Baffle cutout diameter 281mm
• Overall depth 140mm
• Volume occupied by the driver 2.25L
• Net weight 5.31kg
• Frame material Die-cast aluminum